Question about 2003 Chevrolet Monte Carlo
Not sure what you mean this car doesn't have an (antitheft relay) it has a BCM that receives resistance data from ignition switch and when the data matches programming then car will start. if the data is changed or not reading then the car will not start and security light will flash BCM will shut down starter and fuel delivery. if the security light flashes when you attempt to start the car. the security sensor in the ignition switch will need to be replaced and programmed to the BCM. this is very common problem to these cars.
Posted on Sep 26, 2009
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Posted on Jan 02, 2017
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